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Safe Food Handling: Preventing Cross-Contamination and Time-Temperature Abuse

Learn how to keep food safe throughout its flow, including tips to prevent cross-contamination and time-temperature abuse. This guide also covers monitoring time and temperature with various thermometers.

kimberlymartinez
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Safe Food Handling: Preventing Cross-Contamination and Time-Temperature Abuse

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  1. The Flow of Food • To keep food safe throughout the flow of food: • Prevent cross-contamination • Prevent time-temperature abuse 4-2

  2. Preventing Cross-Contamination • Separate equipment: • Use separate equipment for each type of food • Clean and sanitize: • Clean and sanitize all work surfaces, equipment, and utensils after each task 4-3

  3. Preventing Cross-Contamination • Prep food at different times: • Prepare raw meat, fish, and poultry at different times than ready-to-eat food (when using the same prep table) • Buy prepared food: • Buy food items that do not require much prepping or handling 4-4

  4. Preventing Time-Temperature Abuse • Time-temperature control: • Food held in the range of 41˚Fand 135˚F(5˚Cand 57˚C) has been time-temperature abused • Food has been time-temperature abused whenever it is handled in the following ways • Cooked to the wrong internal temperature • Held at the wrong temperature • Cooked or reheated incorrectly 4-5

  5. Preventing Time-Temperature Abuse • Avoid time-temperature abuse: • Monitor time and temperature • Make sure the correct kinds of thermometers are available • Regularly record temperatures and the times they are taken • Minimize the time that food spends in the temperature danger zone • Take corrective actions if time-temperature standards are not met 4-6

  6. Monitoring Time and Temperature • Bimetallic stemmed thermometer 4-7

  7. Monitoring Time and Temperature • Thermocouples and thermistors: • Measure temperature through a metal probe • Display temperatures digitally • Come with interchangeable probes • Immersion probe • Surface probe • Penetration probe • Air probe • Have a sensing area on the tip of their probe 4-8

  8. Monitoring Time and Temperature • Infrared (laser) thermometers: • Used to measure the surface temperature of food and equipment • Hold as close to the food or equipment as possible • Remove anything between the thermometer and the food, food package, or equipment • Follow manufacturers’ guidelines 4-9

  9. Monitoring Time and Temperature Time-temperature indicators (TTI): • Monitor both time and temperature • Are attached to packages by the supplier • A color change appears on the device when time-temperature abuse has occurred Maximum registering thermometer: • Indicates the highest temperature reached during use • Used where temperature readings cannot be continuously observed 4-10

  10. General Thermometer Guidelines • When using thermometers: • Wash, rinse, sanitize, and air-dry thermometers before and after using them • Calibrate them before each shift to ensure accuracy • Make sure thermometers used to measure the temperature of food are accurate to +/- 2˚For +/- 1˚C • Only use glass thermometers if they are enclosed in a shatterproof casing 4-11

  11. General Thermometer Guidelines • When using thermometers: • Insert the thermometer stem or probe into thickest part of the product (usually the center) • Take more than one reading in different spots • Wait for the thermometer reading to steady before recording the temperature 4-12

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